SuperPI for testing your machine. How fast can you do 1M places of PI? True [SuperPI for Windows|http://www.xtremesystems.com/pi/] ([alternate app|http://files.extremeoverclocking.com/file.php?f=36]) or [SuperPI for OS X|http://ocing3.free.fr/FTP/overclocking/super_pi/Kanada_lab/exec_Mac_OSX/].

A [discussion of the possible failure of the $100 laptop project|http://hardware.slashdot.org/hardware/06/11/18/0733221.shtml].